Maria: set columns charsets

The columns were using the default DB charset and collation. This can
cause issues with special characters.
Asset values are now using utf8mb4, with binary collation for case
sensitiveness and speed.
Other columns are set to ascii.

Author: ShimmerGlass

internal/database/mariadb.go

@@ -43,11 +43,11 @@ func NewMariaDB(username string, password string, host string, databaseName stri
 // InitializeSchema initialize the schema of the database
 func (m *MariaDB) InitializeSchema() error {
 	// type must be part of the primary key to be a partition key
-	q, err := m.db.QueryContext(context.Background(), `
+	_, err := m.db.ExecContext(context.Background(), `
 CREATE TABLE IF NOT EXISTS assets (
 	id INT NOT NULL AUTO_INCREMENT,
-	value VARCHAR(255) NOT NULL,
-	type VARCHAR(64) NOT NULL,
+	value VARCHAR(255) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL,
+	type VARCHAR(64) CHARACTER SET ascii COLLATE ascii_bin NOT NULL,
 
 	CONSTRAINT pk_asset PRIMARY KEY (id),
 	UNIQUE unique_asset_idx (type, value),
@@ -56,21 +56,20 @@ CREATE TABLE IF NOT EXISTS assets (
 	if err != nil {
 		return err
 	}
-	defer q.Close()
 
 	// type must be part of the primary key to be a partition key
-	q, err = m.db.QueryContext(context.Background(), `
+	_, err = m.db.ExecContext(context.Background(), `
 CREATE TABLE IF NOT EXISTS relations (
 	id INT NOT NULL AUTO_INCREMENT,
 	from_id INT NOT NULL,
 	to_id INT NOT NULL,
-	type VARCHAR(64) NOT NULL,
-	source VARCHAR(64) NOT NULL,
+	type VARCHAR(64) CHARACTER SET ascii COLLATE ascii_bin NOT NULL,
+	source VARCHAR(64) CHARACTER SET ascii COLLATE ascii_bin NOT NULL,
 
 	CONSTRAINT pk_relation PRIMARY KEY (id),
 	CONSTRAINT fk_from FOREIGN KEY (from_id) REFERENCES assets (id),
 	CONSTRAINT fk_to FOREIGN KEY (to_id) REFERENCES assets (id),
-	
+
 	INDEX full_relation_type_from_to_idx (type, from_id, to_id),
     INDEX full_relation_type_to_from_idx (type, to_id, from_id),
     INDEX full_relation_from_type_to_idx (from_id, type, to_id),
@@ -80,24 +79,22 @@ CREATE TABLE IF NOT EXISTS relations (
 	if err != nil {
 		return err
 	}
-	defer q.Close()
 
 	// Create the table storing the schema graphs
-	q, err = m.db.QueryContext(context.Background(), `
+	_, err = m.db.ExecContext(context.Background(), `
 CREATE TABLE IF NOT EXISTS graph_schema (
 	id INTEGER AUTO_INCREMENT NOT NULL,
-	importer VARCHAR(64) NOT NULL,
+	importer VARCHAR(64) CHARACTER SET ascii COLLATE ascii_bin NOT NULL,
 	graph TEXT NOT NULL,
 	timestamp TIMESTAMP,
-	
+
 	CONSTRAINT pk_schema PRIMARY KEY (id))`)
 	if err != nil {
 		return err
 	}
-	defer q.Close()
 
 	// Create the table storing importers tokens
-	q, err = m.db.QueryContext(context.Background(), `
+	_, err = m.db.ExecContext(context.Background(), `
 CREATE TABLE IF NOT EXISTS importers (
 	id INTEGER AUTO_INCREMENT NOT NULL,
 	name VARCHAR(64) NOT NULL,
@@ -109,10 +106,9 @@ CREATE TABLE IF NOT EXISTS importers (
 	if err != nil {
 		return err
 	}
-	defer q.Close()
 
 	// Create the table storing importers tokens
-	q, err = m.db.QueryContext(context.Background(), `
+	_, err = m.db.ExecContext(context.Background(), `
 		CREATE TABLE IF NOT EXISTS query_history (
 			id INTEGER AUTO_INCREMENT NOT NULL,
 			timestamp TIMESTAMP,
@@ -126,7 +122,7 @@ CREATE TABLE IF NOT EXISTS importers (
 	if err != nil {
 		return err
 	}
-	defer q.Close()
+
 	return nil
 }